Melissa: We also took the Altun Ha trip. Really had a ball. It was an interesting ride to/from up the narrow river and then to the ruins on the bus. Our guide did a great job explaining the ruins. Did you partake of the Viper Rum at Maruba?
I put the excursion on my site in words and pictures at http://oldgatorsnest.addr.com scroll to Part 2 and click the links.

The Oldgator's Homepage
http://oldgatorsnest.addr.com